7893861242 has 8 divisors (see below), whose sum is σ = 11958027732. Its totient is φ = 3907852000.

The previous prime is 7893861229. The next prime is 7893861253. The reversal of 7893861242 is 2421683987.

It can be written as a sum of positive squares in 2 ways, for example, as 6123219001 + 1770642241 = 78251^2 + 42079^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19539059 + ... + 19539462.

Almost surely, 2^7893861242 is an apocalyptic number.

7893861242 is a deficient number, since it is larger than the sum of its proper divisors (4064166490).

7893861242 is a wasteful number, since it uses less digits than its factorization.

7893861242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39078624.

The product of its digits is 1161216, while the sum is 50.

The square root of 7893861242 is about 88847.4042502087. The cubic root of 7893861242 is about 1991.1156965129.

The spelling of 7893861242 in words is "seven billion, eight hundred ninety-three million, eight hundred sixty-one thousand, two hundred forty-two".